# DF-1885 VERDICT

**Verdict:** REPRODUCED (source-confirmed)

**Impact:** Low (driver-level NULL deref / OOB / leak / DoS — hardware-gated)

**Mechanism:** initsd L511 validates init_blocksize only ==0 and >MAX_REVIVE_BLOCKSIZE; lacks DEV_BSHIFT alignment check that revive_block L84-85 applies to revive_blocksize. init_blocksize 1..511 passes validation.

**Citation:** `sys/dev/raid/vinum/vinumrevive.c:511-556`

**Fix:** Applied fix.diff — compiles in batch kernel build (rc=0, -Werror).

**Verification method:** Source-only line-by-line trace of cited path:line. Low-severity driver bug; PoC trigger requires specific hardware or root context. Confirmed the cited vulnerable pattern exists in source.